Introduction Removal Rate with Different Aspect Ratio

CHAPTER 1 INTRODUCTION

1.0 Introduction

This project aim to hands the best possibility on contaminant removal in cavity which involving the operation of fluid dynamic solving problem. Interest in fluid dynamic study embark into widely application solver such piping, air conditioning system, oil and gas, aeronautic and medicine technology development. Deep interest applied fluid dynamic as a control measurement in nuclear reactor which in the early stages with continuous research and development. Fluid acts as the working fluid in nuclear reactor which probable for future operation addition of goods [1] . Heat transfer on the meanwhile, was subjected as the addition heat addition to the system in order to determine the effect which helps for more productive operation involving fluid flow to removing contaminants. Contaminants hence, being produces in some application of closed fluid system and produced either by the friction effect by fluid towards walls or the content of excessive material transported by the working fluid itself. In some application such piping transport for food and gasoline, inert substance are considered as the unnecessary content which need to be avoid from mixing with the required material. Hence, the idea of forming a cavity mostly at the joint of the piping system became region of study interest in maintenance development nowadays. This project hence, focus to only one type of cavity only and being differentiate by different parameter such cavity ratio and degree of temperature supplied. Problem involving fluid dynamics can be solved in three methods which is theoretical, experimental and computational approach. This project focuses on the simulation method and being compared to experimental approach which refer to other paper similar to the problem. Computational fluid dynamic being chosen as the method to solve the problem due to it’s flexibility on problem solving involving fluid dynamics and mathematical calculation as defined earlier. Solver that being used in this project was FLUENT inside ANSYS software that helps to make iteration in finding the solution. Element that consist in FLUENT that need to be shown in this project is forming streamlines and vorticity of the fluid flow to seen the pattern and the contaminant rate of removal. Shape of the cavity that being used is fixed on one shape only which is r ectangular and heat sources situated at the side of the cavity’s wall. Advance understanding in computational of fluid dynamic proved by Nursalasawati which study a different method on mathematical approach that applied by CFD and the improved mathematical modelling capable finds alternative ways on pressure handling in flow [2] .which means that future development will produce accuracy on apply CFD and practical for fluid solver approach rather than experimental and theoretical which contribute to high cost spending and time taken. Validation was the most important part that should be consider in using of CFD for simulation so that the analysis will be based on the real stated problem statement.

1.1 Problem Statement